Most rashes are not serious and will go away on their own. Treat the symptoms and wait a few days to see if the rash subsides. If the rash is severe, is accompanied by other symptoms or appears to be quickly getting worse, see a doctor.
Redness caused by inflammation can be treated with a cream containing a hydrocortisone, such as POLYSPORIN® 1% Hydrocortisone Anti-Itch Cream, which can be purchased in a drugstore. Itchy skin can be treated by applying a medicated anti-itch cream, such as POLYSPORIN® Itch Relief Lotion or 1 % Hydrocortisone Anti-Itch Cream, or by taking an antihistamine by mouth (e.g., diphenydramine, cetirizine).
Cleanse the rash with a mild soap and water and apply a light fragrance-free moisturizer. If the rash is oozing, then you should keep it covered lightly with a non-stick dressing to soak up the fluid.
If the rash does not subside within a week or appears to be getting worse, go see your doctor so that you can get the appropriate diagnosis and treatment.